Dead Rising Deluxe Remaster

After defusing all of Carlitos bombs in the underground tunnels (Case 7-2), you’ll get a cutscene. After said cutscene, you can head back into the tunnels through the same way that you exited. Turn right, make the first left turn, make the first right turn. There you will get another cutscene after which the achievement will pop.

This achievement is very easy as long as you're following the cases within the game. This is done in Case 7-2 after stopping Carlito's bombs in the maintenance tunnels. Here's a video I made of how to get it.